Why was it important to maintain a balance of free states an slave states

It kept each side from having too much power in Congress. It allowed slavery to spread into new territories. It protected the rights of enslaved Africans

Explanation:

It kept each side from having too much power in Congress.

Explanation:

the government wanted to keep the balance because they knew if one side got to much power then some sort of fight would break out. But the system failed and it led to the civil war which lasted 4 years.

haitian revolution slaves initiated the rebellion in 1791 and by 1803 they had succeeded in ending not just slavery but french control over the colony